Post your PROOF that a good gear drive takes more power to drive, because you are wrong again. Just show the proof.
Gears take LESS power to drive than a chain. It's that simple.
Gears are more accurate. Stumpy Thinkins was crazy back then. The lobes he was using on his roller junk aren't as good as high end flat tappet stuff today and he didn't run much spring load either.
If he was writing today he'd say to run a belt drive.
Go look around on YouTube for running chain dynamics. Those junk chains whip around like mad under that timing cover. Another reason you need more P/V with a chain.